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Measuring the distance between two coordinates in PHP
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call this function two times and add them up, alternately you change the function accordingly
– Janith Chinthana
May 19 '16 at 7:04
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Does using final for variables in Java improve garbage collection?
... refereces in the GC "root" locations (like all the objects in the current call stack). Each live object is "marked" as being alive, and any object referred to by a live object is also marked as being alive.
After the completion of the mark phase, the GC sweeps through the heap, freeing memory for ...
Use ASP.NET MVC validation with jquery ajax?
...on field is required."]
}]
This would be returned to your error handling callback of the $.ajax call
You can loop through the returned data to set the error messages as needed based on the Keys returned (I think something like $('input[name="' + err.key + '"]') would find your input element
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Validating parameters to a Bash script
...mp;2 "$@"
exit 1
}
[ "$#" -eq 1 ] || die "1 argument required, $# provided"
echo $1 | grep -E -q '^[0-9]+$' || die "Numeric argument required, $1 provided"
while read dir
do
[ -d "$dir" ] || die "Directory $dir does not exist"
rm -rf "$dir"
done <<EOF
~/myfolder1/$1/anotherfolde...
Getting a list of all subdirectories in the current directory
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To avoid calling os.path.join twice, you can first join and then filter the list using os.path.isdir: filter(os.path.isdir, [os.path.join(d, o) for o in os.listdir(d)])
– quant_dev
Jun 14 '19 at...
outline on only one border
How to apply an inset border into an HTML element, but just only on one side of it.
Until now, I've been using an image to do that (GIF/PNG) that I would then use as a background and stretch it (repeat-x) and position a little off from the top of my block.
Recently, I discovered the outline CSS...
Programmatically Request Access to Contacts
...ess to the address book must be granted before it can be access programmatically. Here is what I ended up doing.
#import <AddressBookUI/AddressBookUI.h>
// Request authorization to Address Book
ABAddressBookRef addressBookRef = ABAddressBookCreateWithOptions(NULL, NULL);
if (ABAddres...
How do I use jQuery's form.serialize but exclude empty fields
...]").serialize() // does the job!
Obviously #myForm gets the element with id "myForm" but what was less obvious to me at first was that the space character is needed between #myForm and :input as it is the descendant operator.
:input matches all input, textarea, select and button elements.
[value...
Checking for empty queryset in Django
What is the recommended idiom for checking whether a query returned any results?
Example:
7 Answers
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ANTLR: Is there a simple example?
...: a number. Or
when we encounter parenthesis, we're making a recursive call back to the
rule 'additionExp'. As you can see, an 'atomExp' has the highest precedence. */
atomExp
: Number
| '(' additionExp ')'
;
/* A number: can be an integer value, or a decimal value */
Numbe...